Fix iframe bug as a side-effect of security policy changes in FF 49 #46
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In version 49, Firefox unintentionally changed load event handling for iframes with a
src="javascript:..."https://bugzilla.mozilla.org/show_bug.cgi?id=1306472This is fixed in patches of both FF 49 and FF 50. The workaround is
src="about:blank"which might be a better practice in any case.